Drying-cylinder.



YPATENTED JAN. 14, 1908.

w. M. GUMMER. DRYING CYLINDER.

APPLICATION FILED APR. 29. 1907.

INYENTOR BYJMWWTTW.

AITEST 6 14751244, @EW

- WILLIAM M. OUMMER, OF CLEVELAND, OHIO.

DRYING-CYLINDER. g

No. area so.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed April 29. 1907- Serial No. 370.804.

Be it known that I',- W1LLIAM M. CUMMEOIR, a citizen of the UnitedStates, residing at Cleveland,- in the county of Cuyahoga and State ofOhio, have invented certain new and .useful' Improvements in Dryin'--Cylinders,

and dodeclare that thefollowing is a full,

clear, and exact description of the invention,

which will enable others skilled in the art'to which it appertains tomake and use the same.

My invention relates to a new and original construction of dryingcylinder ada ted to be installed in a dryin apparatus, al substantiallyas shown an described and particu-.

larly pointed out in the claims. V V In the accompanyin drawings, FigureI is a longitudinal sectiona elevatio'nof a drying apparatus embodyingmy new cylinder in working relation, and Fig. 2 is a cross section ofthe cylinder alone.

, style of cylinder shown in my application,

.inafter fully appear. v

cylinder as an entirety, which consists of a This invention is animprovement on the Ser. No. 352,858, filed January 18, 1907, and pendingconcurrently herewith, as will here- Thus, 0. represents the series ofsix separate longitudinal sections a in this instance, substantiallysegmental in cross section and arranged eccentrically to -.the axis ofthe cylinder as seen by com arison with concentric inner and outer circes a and a, respectively. Said longitudinal sections or plates arespaced apart and supported at their meeting or adjacent edgessuccessively by intervening bars, strips or ribs B to which the edges ofthe plates are riveted 7 and which operate as longitudinal supporting tounite the sections.

members for the cylinder, giving it t 1e needed strength in all itsparts'as well as serving Said bars or rails furrovided with o e'nings 1)thereof which orm draft thermore are products of combustion ass from thefurnace and enter the cylin er into direct contact with the materialunder treatment, and

the usual suction-fan-F at the front of the.

cylinder stimulates draft through these 0 en in s. Now', having-enteredthe body 0 the oy inder'throu h said draft openings I pro-- vide aninterna constructionwhich erforms several important oiiices, as will )eseen. Thus, I build up an entering space or chain-- her just within saidopenings 1) which in a sense continues or extends the draft passage atleast partially above thebody or mass of material that ordinarilyaccumulates atthe bottom of the cylinder to reater or less depth, sothat the material wi '1 be prevented from crowding out through saiddraft open-- ings or filling them up to cut oif the draft,

and then there is the further utility in the construction of saidchamber in that its walls guard said 0 enings against the materialasit-is droppe or cascaded from the lifts as they turn the material loosefrom about the top of the cylinder in successive rotation, and also ofserving as lifts and deflectors for the material. Now, having referenceespecially to the construction of these internal draft chambers orpassages, it is seen that there is a wall 1 for each member referred toherein as the shorter or outer wall which is built upon the edge of thehigher of the two meeting lates while the opposite or inner wall 5referred to also as a uard wall on account of its function, is para lelto wall 4 and is erectthe same level as the inner ed ethereof and isdeflected thence at an ang e of a proximately 45 degrees, or less,across t c said draft chamber or space and across the plane of wall 4'to a point that brings its edge well into the-body of the cylinder, andinto complete shielding relation to its chamber and the exit therefrominto the cylinder. Of course, there is nothing arbitrary in theserelative ositions,dep1ths or widths of said walls, the i ea of the incplate 5 being to serve the several functions and purposes hereinbeforespecified and also to shed and deflect the material cascadedfrom nedinner portion'of wall or.

space behind said chamber guard plate 5, as

will readily 'be seen at the bottom of Fig. 2. It will be understood,also, that the fore oing description has reference more especially toconditions and constructions as they are found at the bottom of thecylinder, where in any event the cylinder is subjected to all its moreimportant tests of operation, and on the-assumption that having aconstruction which meets the conditions or needs .at the bottom of thecylinder there is no occasion for apprehension about operations at theside'and top of the cylinder as it rotates.

Between the walls 4 and 5 ofthe draft chambers I provide each'section cwith a pluralityof more or less upwardly curved lift g ings between saidsections and a walled draft blades 7, which carry their full capacity ofmaterial upward to near the top of the cylinderbefore dischargetherefrom begins, and then the discharge is gradual and while the, fallof the material maybe more or less upon t e inner sides of walls nextbeneath the said material is finally discharged or cascaded from the topof'the cylinder to the bottom, and in its fall is deflected by the outerlIl-a clined surfaces of guard walls-5 behind the same.

, One of the important advantages of the present construction of theguard walls, 5, as compared with the right angled correspond ing wallsin the application upon which this isan improvement, is' that theseinclined guards discharge such material as falls upon them from lifts '7from the top of the cylinder, thus causing the material to cascadethrough the entire width and depth of the cylinder and become exposeddirectly to the strong current of heat that passes through the body ofthe cylinder under the influence of the suction fan at the front,whereas in the right angled form of the said walls, and also in .rightangled lift blades, the material is carried past the center of thecylinder to the opposite side before it is entirely discharged, and insuch discharge it tends to fall on the backs of the other 11ft bladesupon that side and against the sideof cylinder and does not get thebenefit of the'long drop through the volume of heat in the middle of thecylinder as in the present construction. .The transversely curved lifts7 likewise contribute to this better result as compared with rightangled lifts used commonly heretofore. Said lifts are concave-convex incross section but their concave, side is uppermost.

What 1 claim is 1. A drying cylinder formed in longitudinal sectionshaving strengthening ribs be tween adjacent edges of said sectionsprovided with draft openings, and'walled draft passages' inside thecylinder into which said openings discharge having varying elevation thehigher of said walls being bent to an angle of inclination at theirinner portions across the plane of the opposite walls into guardingrelations.

2. A drying cylinder having longitudinal draft openings through the wallthereof and draft chambers in said cylinder having parallel walls ofdillerent elevation on opposite sides lengtliwise,one of said wallsbeing bent at an angle of inclination of approximately forty-"livedegrees laterally and projected across the plane of the opposite wall.-

3. A drying cylinder consisting of-several longitudinal segmentalsections having their meeting edges spaced apart and draft openbers.

chamber next within said openings, one wall of said chamber beingerected on each of said meeting sections and the higher wall having aninclined extension projecting across said chamber andinto the interiorof the cylinder, "thereby serving as a lift on one side and as adeflector, on the other and as a guard for said chamber. y

4. A drying cylinder formed in segmental sections lengthwiseeccentrically arranged,

. spacing pieces between the meeting edges of,

said sections provided with draft openings and draft chambers lengthwisenext within said openings provided with parallel walls, one wall beingiixed on each meeting section and the higher wall having an inclinedinner lilting and deflecting portion, and. transversely curved liftblades between said char in .dinal chambers, and the walls of one sideof said chambers extending into said cylinder and having their innerportions arranged to receive and carry a portion of the dischargefronrsaid lift blades.

7. Adrying cylinder having aseries of walled draft chamberslengthwiseinside and the walls on one side of said chambers having innerextensions at an inclination to the Walls on the opposite sides of saidchambers and overlapping the same, and lift blades with concave carryingsides arranged between said Walled chambers.

8. A rotatabledrying cylinder'formed of a plurality of segmentalsections spaced apart at their edges to provide longitudinal draftintakes, .and longitudinal deflecting plates within the cylinder havingextensions pro jecting over said draft intakes to guard against theescape of material from said cyl.

tion' in the presence of two witnesses.

'WlLLIAM M. eU Mnn.

Witnesses 1 it. B. Moshe, l (3. MussuN.

'ieo

